s390/pci: remove stale rc

Get rid of a leftover return code in arch_setup_msi_irqs.
Signed-off-by: NSebastian Ott <sebott@linux.ibm.com>
Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>

arch/s390/pci/pci.c

@@ -420,7 +420,6 @@ int arch_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type)
 	/* Request MSI interrupts */
 	hwirq = 0;
 	for_each_pci_msi_entry(msi, pdev) {
-		rc = -EIO;
 		if (hwirq >= msi_vecs)
 			break;
 		irq = irq_alloc_desc(0);	/* Alloc irq on node 0 */